Premium
Sponge city: water balance of mega‐city water use and wastewater use in Hyderabad, India
Author(s) -
Van Rooijen Daan J.,
Turral Hugh,
Wade Biggs Trent
Publication year - 2005
Publication title -
irrigation and drainage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 38
eISSN - 1531-0361
pISSN - 1531-0353
DOI - 10.1002/ird.188
Subject(s) - wastewater , irrigation , water resource management , environmental science , agriculture , urbanization , water balance , hydrology (agriculture) , rainwater harvesting , surface runoff , water resources , geography , environmental engineering , engineering , geotechnical engineering , economics , ecology , archaeology , economic growth , biology
An Erratum has been published for this article in Irrigation and Drainage 54(4) 2005, 483. Cities are increasingly competing with agriculture for water resources as urbanization unfolds in water‐scarce river basins in Asia. This study documents a partial water balance of Hyderabad city, located in the Krishna basin and currently the fastest growing city in India, and gives estimates of its impact on both traditional and wastewater irrigated area. Though previous projects have had significant local impacts on irrigated areas, additional water supply from a major reservoir on the Krishna river to Hyderabad is likely to be a relatively small component of total reservoir releases to irrigated agriculture (5.3–10.2% by 2030). Urban storm water runoff generates a volume of water of the same order of magnitude as the domestic wastewater volume, though the fate of this water vis‐à‐vis irrigated agriculture is not known. Wastewater irrigation compensates for more than half of the traditional irrigated area water lost, so the urban–agriculture conflict also generates significant opportunities that also need to be considered. However, the impact of wastewater use on crop yields, cropping changes, human health and the environment need to be fully addressed. Copyright © 2005 John Wiley & Sons, Ltd.